Each player starts the game with a brief introduction, during which he receives several characters. Then, over the course of the game, you must farm character shards. To find out where to get the shards of a particular character, go to the Characters section, select the unit you are interested in, and then click the Find button. All the places where you can get the shards and as a result - unlock the character, will appear on the new screen.
Once you have unlocked the Squad Arena, try to get as high in the ranking as possible to gain Squad Arena Tokens. Four hundred such tokens will allow you to receive 5 character shards. You can gain characters similarly by participating in Galactic War or Fleet Arena. Some units can also be acquired through the Guild Store.
Every month there will also be prizes for daily log-ins to the game, where character shards will also appear. If you log in every day, you will obtain 30 bonus shards during a month.
If you choose to spend real money in the game, you can buy recurring batches of characters or one of two sets: Chromium Mega-Pack or Chromium Data Pack. In the case of the first package, in addition to unit shards, the player gets one guaranteed hero, ready to be unlocked.